JPH0220197A - Line connecting system between numerical control device and its peripheral equipment - Google Patents

Abstract

PURPOSE:To reduce the working quantity of an operator by automatically setting the communication condition of a communication line between a numerical control device and connected peripheral equipment, and automatically setting a communicable condition. CONSTITUTION:When the peripheral equipment is connected through a signal cable to the numerical control device, and a communication line setting command is inputted to the numerical control device, the microprocessor of the numerical control device starts a processing, first, peripheral equipment calling command by means of the initially set condition is sent to a communication cable, to which the peripheral equipment is connected. Further, a timer T is started, the command in a certain condition is sent, when a response signal is transmitted from the peripheral equipment before the time of the timer T is up, the communication condition is fixed at the currently set command condition, and stored into the memory in the numerical control device as the communication condition of the peripheral equipment. Thus, since the communication condition with the peripheral equipment is automatically determined, the manual setting of the line with the peripheral equipment is made unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a line connection system between a numerical control device and a peripheral II device of the numerical control device.

2. Description of the Related Art Conventionally, when connecting a peripheral device to a numerical control device, an operator had to manually set the line conditions for communication with the peripheral device in the numerical control device.

For example, depending on the peripheral equipment connected to the numerical control device,
Operators had to manually set information on the numerical control device, such as the baud rate for communication, the number of stop bits, and the type of peripheral device to be connected, such as a floppy disk drive or a paper tape reader. .

Problems to be Solved by the Invention As mentioned above, in the method in which the operator manually sets the communication line with the numerical control device and the peripheral device, the operator has to set up the communication line with the numerical control device and the peripheral device. You need to know what settings are required. Further, the operator needs to set the numerical control device and peripheral devices to a communicable state for the necessary setting items.

The setting work of these operators must be done while referring to the manuals of the numerical control device and peripheral VI equipment, and it is also necessary to confirm that the settings are correct. I do a lot.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a line connection method that automatically sets conditions for setting up a communication line between a numerical control device and a peripheral device.

Means for Solving the Problems In order to solve the above problems, the numerical control device of the present invention has a peripheral device connecting cable of the numerical control device.
! The communication conditions for setting are changed sequentially and a call command is sent to the peripheral device. When the peripheral device meets the communication conditions and detects the call command, it sends a response signal to the numerical control device, and the numerical control device The communication conditions are fixed to the communication conditions of the paging command responded to after receiving the response signal, and the line settings are automatically performed.

Operation The numerical control device sequentially sends out paging commands to the cables connected to peripheral devices by changing communication conditions such as baud rate and number of stop bits. The peripheral device side will receive this paging command, but if the communication conditions do not match the peripheral device connected to the cable, the peripheral device will not be able to recognize the paging command and will not receive a response signal. There are no words to send out. On the other hand, when the communication conditions are met and the peripheral II detects the calling command, it transmits a response signal to the numerical control device. The numerical control device outputs a response signal and fixes the communication conditions at the current moment. As a result, the communication line between the numerical control device and the peripheral device is automatically set to a communicable state.

Embodiment FIG. 1 shows a line setting processing flow 1p-1- of a numerical control device in an embodiment of the present invention. Except for the fact that the line setting protocol shown in Figure 1 is provided between the numerical control device and peripheral devices, the hardware configuration of the numerical control device and peripheral devices is the same as that of the conventional one. Therefore, the configuration of the numerical control device and peripheral equipment will be omitted.

When a peripheral device is connected to the numerical control device via a signal cable and a communication line setting command is input to the numerical control device, the microprocessor of the numerical control device performs the ! I! First, a command as a peripheral device call command according to the initially set article f[ is sent to the communication cable to which the peripheral device is connected (step Sl).

In other words, as shown in FIG. 2, a command 'ST' consisting of an initialized baud rate and number of stop bits
In FIG. 2, the command "ST N" consisting of 2400 baud and 2 stop bits is sent as the initial illumination command.

Then, the timer T is started (step S2), and the timer T measures a set time tl (see FIG. 2), and it is determined whether or not a response signal has been returned from the peripheral device before the timer T times out (step S3). 84) If there is no response signal and timer T times up, it is difficult to judge whether the command has been sent with all setting values. If there are n types of commands with different setting values, it is judged whether or not the n types of commands have been sent. (step S5), and if a command has not been sent out with all set values, a command with the next set value is sent out (step S36). In addition, in Figure 2 a
3, the command "S T N " is sent at 4800 baud and 2 stop bits. Then, the timer T is reset and started (step S7), and the operation is continued until the timer T times out. '5 signal has been sent from the peripheral device (step 83.8)
4). Thereafter, steps 83 to S7 are repeated until a response signal is transmitted. If you do not receive a response signal even after transmitting =lmant ``S -r N'', there may be a connection error with the peripheral equipment or communication loop. An abnormality indication of the equipment is displayed (step 88).

On the other hand, if a response signal is received from the peripheral device before the timer times up after sending a command with a certain condition (t2 < tl in Figure 2), the communication condition is fixed to the currently set command condition. , and stored in the memory of the numerical control device as communication conditions for peripheral devices (step 89). The numerical control device changes the communication conditions such as baud rate and number of stop bits and outputs the peripheral device calling signal “S T N ”.
The peripheral Ili device sends a call signal command 'S T N '' consisting of the clause f1 that matches its own communication conditions.
When it receives this, it detects that a calling signal has been sent and sends out a response signal. For example, FIG. 2 shows an example in which the peripheral device connected to the communication cable is a floppy disk drive (FDD), and the communication condition of the floppy disk drive is a configuration of 9600 bits and 2 stop bits. The numerical controller sends out the output signal command 〛STN''' consisting of 2400 baud 2 stop bits, and then 480 baud 2 stop bits.
When the 0 baud, 2 stop bit command "S T N" is sent, and then the 9600 baud, 2 stop bit command "S T N" is sent, the floppy disk drive device of the peripheral device receives the call signal command 'S T N'.
96 to the numerical control device.
The set time t1 of the timer T is set to be better than the time t2 until the peripheral device sends out the response signal. ), the numerical control device receives the command '0KI-''' of this response signal (step S3), fixes the value of the communication line fl to the current value (9600 baud, 2 stop bits in the example of FIG. 2), This value is stored in the memory, and the connected peripheral device is recognized from the command returned from the peripheral device and stored in the memory (step 510).

In other words, in the example shown in FIG. 2, it is detected from the reply command "OK F" that the floppy disk drive device is connected and stored. After the communication line is thus set up, data is exchanged between the peripheral device and the numerical control device according to the stored communication conditions.

In this way, the communication conditions with the connected peripheral devices are automatically determined, and the number (10) of the peripheral devices connected to the control device is automatically recognized.
There is no need to manually configure the line settings for one device.

Effects of the Invention In the present invention, the communication conditions of the communication line between the numerical control device and the connected peripheral devices are automatically set, and the communication conditions are automatically set. Therefore, the operator can simply perform the numerical control. All you need to do is connect the device and the peripheral devices using a communication couple, and there is no need to perform any other operations to set up the 3 communication lines. This can be done without reducing J-hang.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a flowchart of a line setting process for a numerical control device in an embodiment of the present invention, and Fig. 2 is an explanation explaining an example of signal transmission and reception between the numerical control device and peripheral equipment in the same embodiment. It is a diagram. Patent applicant FANUC Corporation

Claims (1)

[Claims] The numerical control device sends a call command for the peripheral device to the peripheral device connection cable of the numerical control device by sequentially changing the communication conditions for line setting, and when the peripheral device detects the call command when the communication conditions match, , a response signal is returned to the numerical control device, and the numerical control device receives the response signal and fixes the communication conditions to the communication conditions of the responded paging command, and automatically performs line settings. Line connection method with peripheral devices.